Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C5/00—Constructions of non-optical parts
  • G02C5/001—Constructions of non-optical parts specially adapted for particular purposes, not otherwise provided for or not fully classifiable according to technical characteristics, e.g. therapeutic glasses
• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C7/00—Optical parts
  • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
  • G02C7/105—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having inhomogeneously distributed colouring

Definitions

• the present invention relates to the field of ophthalmic lens staining. More particularly, the invention relates to a novel multi-tone coloring design of ophthalmic lenses.
• ophthalmic lenses means corrective and non-corrective lenses, but also masks and other vision devices intended to be worn in front of the eyes.
• the lens a biconvex lens behind the iris, participates in the process of focusing images on the retina when the object being viewed changes its distance.
• This process changes with age: the lens loses its ability to bulge when an object is approached from the eye, for example during reading, thus reducing the ability of the eye to see close objects; it is presbyopia.
• the lens also undergoes histological changes which in particular lead to an increase in the absorption and dispersion of visible light in the short wavelength range, ie say blue light, causing functional disorders of contrast sensitivity and glare sensitivity that appear and / or increase with age.
• yellow filters are recommended. These filters, by specifically cutting the short wavelengths, thus reduce the genes related to 1 glare of veil and improve the perception of contrasts.
• the technical problem to be solved by the present invention is to improve the contrast sensitivity and reduce the susceptibility to glare of persons suffering from impaired lens transparency as described in the introduction, while reducing or reducing avoiding a possible disturbance of their circadian rhythm due to the absence of blue light.
• glasses comprising both a central zone capable of absorbing short wavelengths, essentially corresponding to the zone of the glass explored by the user's gaze, and a peripheral zone. able to transmit mainly short wavelengths and thus absorb long wavelengths.
• This last zone surrounds the central zone, and is generally not covered by the user's gaze.
• the central zone absorbing short wavelengths (less than 480 nm) in the viewing zone plays the well-known role of improving the contrast sensitivity
• the peripheral zone outside the viewing zone, increases the short wavelength component (blue) of the penetrating light in the eye, and thus compensates the absorption of it by the central area.
• the present invention therefore relates to an ophthalmic lens, characterized in that it comprises, on its surface,
• a first central zone having a transmission of less than 50% in the short wavelength range between 400 nm and 480 nm, and a transmission greater than 50% in the long wavelength range between 480 nm and 700nm, and
• a second peripheral zone having a transmission greater than 50% in the short wavelength range between 400 nm and 500 nm, and a transmission of less than 50% in the long wavelength range between 500 nm and 700nm.
• the invention furthermore relates to the use of such an ophthalmic lens for the manufacture of spectacles intended to improve the contrast sensitivity and to reduce the susceptibility to
• Glare of persons suffering from impaired lens transparency while reducing or avoiding disruption of their circadian rhythm are usually people over 60, preferably over 70, and in particular over 75 years old.
• the subject of the invention is a method for the symptomatic treatment of disorders related to an alteration of the transparency of the crystalline lens and of prophylactic treatment of circadian rhythm disturbance, including the prescription of spectacles with such ophthalmic lenses.
• the adjective "central" used to describe the filter area absorbing short wavelengths, does not mean that this area occupies a position corresponding to the geometric center of the ophthalmic lens according to the invention. It simply expresses the fact that this area of the lens is not in contact with the periphery of the ophthalmic lens but is consecrated by the long wavelength absorbing peripheral filter area.
• the central zone is generally centered around this optical center or each of these optical centers.
• the central zone absorbing the short wavelengths advantageously has a transmission less than or equal to 30% for short wavelengths between 400 and 480 nm and a transmission greater than 50% in the long wavelength range included between 480nm and 700nm. Even more advantageously, the central zone absorbing the short wavelengths has a transmission of less than or equal to 20% for short wavelengths between 400 and 480 nm.
• the central zone is yellow in color.
• the peripheral zone absorbing the long wavelengths has a transmission greater than or equal to 60% in the short wavelength range between 400 nm and 500 nm, and a transmission of less than 50% in the long-range domain. waves between 500nm and 700nm. More preferably, the peripheral zone absorbing the long wavelengths has a transmission greater than or equal to 70% in the short wavelength range between 400 nm and 500 nm.
• the peripheral zone is blue in color.
• the ophthalmic lens is an afocal ophthalmic lens.
• the central zone preferably has a circular or oval shape.
• the ophthalmic lens is a monofocal corrective ophthalmic lens.
• the central zone preferably of circular or oval shape, is generally centered on the optical center of the lens.
• FIGS. 1 and 2 show such monofocal lenses comprising a long wavelength absorbing peripheral filter zone (1) surrounding a central zone (2) absorbing short wavelengths of circular or oval shape, centered around the center optical C of the lens.
• the diameter of the central circular zone is between 5 and 35 mm, preferably between 10 and 25 mm, and is in particular close to 20 mm.
• the present invention is applicable to other types of lenses, including progressive lenses.
• This type of lens is remarkable in that it has two detectable and controllable optical zones, that is to say a far vision zone and a near vision zone, connected by a progression corridor which allows eye from a vision from afar to a near vision in softness, thus providing a real visual comfort to the wearer.
• At each of these two optical zones can be associated a center, called optical center of far vision and near vision optical center.
• a particular embodiment of the invention therefore relates to a progressive corrective ophthalmic lens with an optical center of far vision and an optical center of near vision. In the case of such a lens shown in FIG.
• the central zone absorbing the short wavelengths, comprises a first zone (3), preferably of circular or oval shape, essentially covering the zone around the optical center. from a distance, and a second zone (4), preferably circular or oval, covering the area around the near vision optical center, and a band (5) connecting these two zones and corresponding to the path followed by the eye as it passes from one to the other.
• This band corresponds, in other words, to the aforementioned "progression corridor".
• the remainder of the lens surface is covered by the long wavelength absorbing peripheral zone (1).
• the largest diameter or dimension of the central zone (3) covering the far vision optical center is preferably between 5 and 35 mm, in particular between 10 and 25 mm, and is even more preferably close to 20 mm.
• the central zone (4) covering the near vision optical center is generally smaller than that corresponding to the far vision optical center.
• the diameter or the largest dimension of the central zone (4) covering the optical center of vision of It is advantageously between 5 and 15 mm, preferably between 7 and 13 mm, and is in particular close to 10 mm.
• the width of the strip connecting these two zones is advantageously between 3 and 7 mm, preferably between 4 and 6 mm, and is in particular close to 5 mm.
• this band (5) connecting the two central zones (3) and (4) may optionally have a long wavelength filter zone, that is to say a filter zone having the same characteristics as the peripheral zone (1).
• the short wavelength absorbing core area dimensions shown above are appropriate ranges for most eyeglass wearers, but do not account for individual differences. However, it will be readily understood that it is advantageous to limit as much as possible the size of the central zone to that of the zone actually explored by the human eye in order to maximize the extent of the long-wave absorbing peripheral zone. , essential for regulating the circadian rhythm.
• Such an optimization of the relative dimensions of the short wavelength absorption and the long wavelength absorption zones can be carried out for example by means of the Vision Print System (VPS) technology developed by the Applicant in the context of other research concerning visual behavior. It is a device for describing the interindividual differences in eye and head coordination strategy in the visual exploration of the environment, also called "eye-head behavior".
• VPS Vision Print System
• the determination of the eye-head behavior of a spectacle wearer thus makes it possible to optimize the size of the central zone. If the wearer tends to turn his head rather than his eyes to follow an object, a central area of 5 to 20 mm is usually sufficient to cover the entire viewing area of the glass. Conversely, if the wearer tends to move his eyes rather than his head to look at an object, then a central area covering a relatively wide area of the lens is necessary, for example an area having a diameter of between 20 to 35 mm .
• the peripheral zone is not necessarily adjacent to the central zone and can in principle be separated from it by a colorless strip.
• the long-wavelength absorbing peripheral zone of the ophthalmic lens of the invention preferably covers any the area not covered by the central area.
• the hue of the central zone which is preferably yellow, or the peripheral zone, which is preferably blue in color, may have a very low intensity, and be associated with white (that is to say, untinted or called gray) glasses. of "crystal" color) for use indoors or at low light levels.
• the hue of these areas may also have a strong intensity and be associated with sunglasses for use outdoors or under high light levels.
• tinted filters preferably corresponding to yellow and blue dyes on suitable supports in mineral or organic glass for producing an ophthalmic lens according to the invention can be carried out for example by sublimation and / or by printing with inkjet.
• These techniques are described for example in the patent applications WO 2006/079564 and FR 2 881 230 in the name of the Applicant. It is also possible to envisage the application to a substrate of a pixelated film combined with an inkjet printing technology as described in the patent application WO 2006/013250.
• anionic polyurethane (W234 sold by the company Baxenden) are mixed with magnetic stirring with 60% by weight of colloidal silica.
• Orma TM 500 rpm / 20 seconds.
• the deposit is dried for 1 h at 100 ° C. in an oven.
• the thickness of the primer thus obtained is 3.6 ⁇ m.
• the optical lens comprising the primer and the substrate can be printed with a Canon i865 printer.
• the yellow and blue areas are drawn using Powerpoint TM software.
• the Ophthalmic lens is inserted into the printer's loading module, which is connected to the computer with the file "yellow filter - blue filter" under Powerpoint TM. The impression is made.
• An ophthalmic lens is obtained with a yellow filter and a blue filter.

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• 2006
  • 2006-11-17 FR FR0610095A patent/FR2908897B1/fr active Active
• 2007
  • 2007-11-15 WO PCT/FR2007/052344 patent/WO2008059175A1/fr active Application Filing
  • 2007-11-15 EP EP07858700A patent/EP2084569B1/fr active Active
  • 2007-11-15 JP JP2009536777A patent/JP5259609B2/ja active Active
  • 2007-11-15 US US12/514,544 patent/US8096656B2/en active Active
  • 2007-11-15 AT AT07858700T patent/ATE539372T1/de active
  • 2007-11-15 ES ES07858700T patent/ES2380155T3/es active Active
  • 2007-11-15 BR BRPI0718920A patent/BRPI0718920B1/pt active IP Right Grant

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Non-Patent Citations (1)

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